/Engine/Source/Editor/GraphEditor/Public/SGraphPinNameList.h
Function to set the newly selected index
void ComboBoxSelectionChanged ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FName](API\Runtime\Core\UObject\FName) > StringItem, [ESelectInfo::Type](API\Runtime\SlateCore\Types\ESelectInfo__Type) SelectInfo )